package dq.study.designmodel.observer;

/**
 * @author dongqun
 * @Description: 爷爷: 观察者
 * @date 2019/4/15 22:19
 */
public class GrandParent implements SleepListener {

    @Override
    public void doAction(Event event) {
        System.out.println("爷爷给唱戏了");
    }
}
